package com.bestsonic.crawler.utils;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

import com.bestsonic.crawler.model.*;

public class RegexUtils {

	public static List<String> Regex(String content, String split,
			Regex... regex) {
		List<String> result = new ArrayList<String>();
		String[] str = null;
		if (split != null) {
			str = content.split(split);
			for (String string : str) {
				for (Regex reg : regex) {
					if (reg.matches(string, Pattern.MULTILINE) != null)
						result.addAll(reg.matches(string, Pattern.MULTILINE));
				}
			}
		} else {
			for (Regex reg : regex) {
				List<String> list = reg.matches(content, Pattern.MULTILINE);
				if (list != null)
					result.addAll(list);
			}
		}
		return result;
	}

	public static <T> List<T> Regex(String content, Bean<T> bean) {
		List<T> result = new ArrayList<T>();
		result.addAll(bean.matches(content, Pattern.MULTILINE));
		return result;
	}

	public static String RegexFirst(String content, String split,
			Regex... regex) {
		List<String> list = Regex(content, split, regex);
		if (list.size() > 0)
			return list.get(0);
		else
			return null;
	}

	public static String getUTF(String theString) {
		char aChar;
		int len = theString.length();
		StringBuffer outBuffer = new StringBuffer(len);
		for (int x = 0; x < len;) {
			aChar = theString.charAt(x++);
			if (aChar == '\\') {
				aChar = theString.charAt(x++);
				if (aChar == 'u') {
					int value = 0;
					for (int i = 0; i < 4; i++) {
						aChar = theString.charAt(x++);
						switch (aChar) {
						case '0':
						case '1':
						case '2':
						case '3':
						case '4':
						case '5':
						case '6':
						case '7':
						case '8':
						case '9':
							value = (value << 4) + aChar - '0';
							break;
						case 'a':
						case 'b':
						case 'c':
						case 'd':
						case 'e':
						case 'f':
							value = (value << 4) + 10 + aChar - 'a';
							break;
						case 'A':
						case 'B':
						case 'C':
						case 'D':
						case 'E':
						case 'F':
							value = (value << 4) + 10 + aChar - 'A';
							break;
						default:
							throw new IllegalArgumentException(
									"Malformed   \\uxxxx   encoding.");
						}

					}
					outBuffer.append((char) value);
				} else {
					if (aChar == 't')
						aChar = '\t';
					else if (aChar == 'r')
						aChar = '\r';
					else if (aChar == 'n')
						aChar = '\n';
					else if (aChar == 'f')
						aChar = '\f';
					outBuffer.append(aChar);
				}
			} else
				outBuffer.append(aChar);
		}
		return outBuffer.toString();
	}
}
